Laminated shim



1,635,753 y 1927' 1.. A. JOHNSON LAMINATED SHIM Original Filed July 31.1924 Moemtor ficaornegs Patented July 12, 1927.

" 1.1.0! A. common, orssir rmoisco, cummmmn'rnn sum.

Application fled July 31, lmyflerlal Ili'b. 729,820. Renewed Bay 28,1827.

This invention relates particularly to laminated shims for use inconnection with the bearings of internal combustion engines farmmachinery, and other mechanica equipment. Such bearings usually comprisebearing boxes made up of two half .sections babbitted internall 'toreceive the rotary element therein. hese twohalf sections must be soaccurately fitted together that the rotary element is held securelytherein, but freely rotatable. To so accurately space these bearinghalves, shims varying in thickness are used therebetween. Also as thebabbitt of the bearing becomes worn in use, the bearing halves maybeadjusted to take up this wear, and this adjustment is accomplished byremoving certain of these shims.

In my copending application, Serial No. 727 ,231 filed July 21, 1924, Ihave disclosed an im roved laminated shim comprisin several s eets oflaminations lightly stuc toether at one ed e thereof in a manner to fieeasily remove for the purpose defined. The primar object of my presentinvention is to provi e such a shim with a block of Babbitt metal on thefront or inner edge thereof,such block preferably being secured to onlyone of the intermediate laminations -in a manner to be positionedbetween the babbitt sections of a bearing whereby the several blocks ofbabbitt will be compressed together to form a smooth and substantially.jointless bearing when the parts are secured in lace. ith the above andother ob ects in view,

my invention consists in the features of con-' struction and operationset forth in the following specification and illustrated in theaccompanying drawing. In such drawing,

annexed hereto andforming a part of this specification, I haveillustrated certain detailed embodiments of my invention, but it will beunderstood that the invention can be otherwise embodied, and that thedrawing is not to be construed as defining or limiting the scope of theinvention, the claims appended to this specification being relied uponfor that purpose.

Referring to the figures of the drawing:

Fig. 1 is a perspective view of a laminated shim embodying my invention.

Fig. 2 is a cross-section thereof taken on line 22 of Fig. 1.

Fig. 3 is a sectional view taken on line 4 is an edge view of thebabbitt support ng sheet or lamination of the shim.

' Fig. 5 is an elevation showing a modification of the shim shown in Fis. 3 and 4.

Fig. 6 is a front edge view t ereof.

Fig. 7 1s a cross-sectional view through the shim on line 77 of Fig. 3.

Fig. 8 is a cross-sectional view through a crank bearing showing two ofmy improved shims in use therein. a Fig. 9 is a perspective viewillustrating the several parts of the shim'disassembled.v

- The shim 1 shown in Fig. 1 of the drawing comprises a relatively thicksheet or plate" of metal 2 having superimposed thereon a pluralit ofrelatively thin sheets 3, the sheets pre erably varying in thickness asshown in Fig. 2. hese sheets are formed to the shape of the bearingwherein they are adapted to be used and are provided with a boltreceiving opening 4 therethrough. As illustrated in Fi 1 all of thesesheets are lightly. and detac ably secured together with a small portionof solder 5 on the rear thereof. An elongated block of soft metal 6,preferabl babbitt, is secured to the front edge of t e shim in themanner and for the purpose hereinafter described. For the pur that whileI have above referred only to solder as securing the several laminationsof the shims together, any substance which will perform this functionmay be used. Thepurpose of this substance on the shims is to act as abinder to facilitate the installation of the shims in the bearing, andto provide a laminated shim easily handled in the trade. H Directlyadjacent the relatively thick sheet or plate 2 of the shim is preferablythe next thickest sheet 7 and: the block 6 of Babbitt metal ispreferably secured to this sheet. As shown in Fig. 2, the front edge ofthis sheet projects outwardly beyond the other sheets, and the block isconnected to this projecting edge. Preferably, and for the purpose ofmore securely holding the block, this edge is upset as shown in Figs. 3to 7 ,inclusive. In Figs. 3, 4 and 7, the edge is cut at 8 and thesevered p01 tions thereof are bent in opposite directions. In Figs. 5and 6, the edge 8 of the plate 7 is corrugated. As thus constructed, theblock clings ver securely to the sheet.

In Fig. 8 I ave shown two of my mproved shims in use on a crank bearing.This bearing comprises two halves 9 and 10. the half 9 being an integralpart of the crank 11. These halves are babbitted at 12 and are adaptedto be secured together by bolts 13. In assembling the parts, adjustmentsmust be such that when the bolts 13 are tightened the shaft 14: will beheld in the hearing so close as to avoid any vibration but free torotate therein. This fine adjustment is secured by insertin shims 10fthe proper thickness between bearing halves 9 and 10. In assembling thehalves 9 and 10, a shim of approximately the thickness required isselected and assembled in the hearing. If the bearing is found to be tooloose, one or more of the thin laminations 3 are broken off until theshim is of the proper thickness.

This improved shim is of particular value in repair work when the shaft,through wear, has become loose. In such case the bolts 13 are loosenedand one or more of the thin laminations removed whereby the loosenesswill be taken up when the bolts are again tightened.

As shown in Fig. 8, the shims are so constructed that, when in place,the blocks 6 of Babbitt metal are directly between the ends of thebabbit halves 12. When the bolts 13 are tightened the metal blocks 6 arecompressed into the babbitt 12 with which they cooperate to form asmooth and substantially jointless bearing for the said shaft.

In Fig. 9, I have shown the several parts of my improved shim indisassembled relation instead of being bound together in a single onepiece shim as illustrated in Fig. 1. The part 2 is the relatively thicksheet or plate heretofore described. The intermediate portion comprisesthe sheet 7 havin the block of Babbitt metal secured to the rent edgethereof, as has also been heretofore described. The plate 2 is adaptedto seat on one side of the sheet 7 and the several thin sheets 3 on theopposite side thereof. In Fig. 1 all of these parts are li htly stucktogether by a bit of solder 5. uch an assemblage makes the shim veryconvenient to handle and use.

It may be desirable to manufacture and place my shim on the market inthe disassembled form shown in Fig. 9, and it should be understood thatthe shim in such form,

I claim and desire to secure by Letters Patcut is 1. As an article ofmanufacture, a laminated shim comprising a plurality of relatiely thinsheets of metal superimposed on each other, means lightly and detachablysecuring the sheets together, the front edge of one of the sheetsrojecting outwardly of the other sheets, and a block of soft metalsecured thereto and extending along the front edge of the shim.

2. As an article of manufacture, alaminated shim comprising a pluralityof relativel thin sheets of metal superimposed on eaci other, meanslightly and detachably securing the sheets together, the front edge ofone of the sheets projecting outwardly of the other sheets, and thisportion of such sheet being formed unevenly to present rippin shouldersor portions, and an e ongated block of soft metal secured to the saidfront edge and in gripping relation to the said shoulders or portions.

3. As an article of manufacture, a-laminated shim comprising a pluralityof relatively thin sheets of metal superimposed on each other, meanslightly and detachably securing the sheets together, the front ed e of.one of the sheets projecting outward y of the other sheets and bent outof the lane of the said sheet, and an elongated lock of soft metalsecured thereto and extending along the front edge of the shim.

4. As an article of manufacture, a laminated shim comprising a pluralityof relatively thin sheets of metal superim osed on each other, meanslightly and detac ably securing the sheets together, the front edge ofone of the sheets projecting outwardl of the other sheets and corrugatedto exten out of the planeof the said sheet on both sides thereof, and anelongated block of soft metal secured thereto and extending along thefront edge of the shim.

5. As an article of manufacture, a laminated shim comprising a pluralityof sheets of metal superimposed on each other, the front edge of saidsheets being straight and relatively long certain of the sheetsprojecting outwardly beyond the front ed e of the other sheets, and anelongated bloc of soft metal secured to and along the front edge of saidoutwardly projecting sheets.

LLOYD A. JOHNSON.

